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Part: FAN8412M
Category:
Description: FAN8412M - DC Cooling Fan Pre-driver
Company: Fairchild Semiconductor
Datasheet: Download FAN8412M datasheet File size : 400 kB
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www.fairchildsemi.com
FAN8412M
2 Phase Half Wave BLDC Motor Predriver
Features
· A Wide Range of Operation Voltage: 4V to 28V · Locked Motor Protection With Open Collector and Auto Retry · Compact Package: 8-SOP-225
Description
The FAN8412M is a monolithic integrated circuit, and suitable for DC cooling fan motors predriver.
8-SOP-225
1
Typical Applications
· DC Cooling Fan Motor
Ordering Information
Device FAN8412M FAN8412MX Package 8-SOP-225 8-SOP-225 Operating Temp. -25°C ~ 85°C -25°C ~ 85°C
Rev.1.0.0
©2003 Fairchild Semiconductor Corporation
FAN8412M
Block Diagram
V CC 1
OUTB 8
IN+ 2
Commutation & Control
OUTA 7
AL 3
LD 6
IN4
GND
5
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 Pin Name VCC IN + AL IN - GND LD OUTA OUTB I/O P A O A P A A A Pin Function Description Supply voltage Hall input + Alarm output Hall input - Ground Triangle pulse generator for lock detector and automatic restart Motor output A Motor output B Remark Open Collector -
2
FAN8412M
Equivalent Circuits
Description Pin No. Internal Circuit
OUTA
7
Vcc
Commutation
OUTB
8
7 8
3
AL
3
Lock detector
6
Lock detector & Automatic restart
Commutation
LD
6
VLDCP
VLDCL
Vcc
IN+ 2
2
4
IN-
4
3
FAN8412M
Absolute Maximum Ratings (Ta = 25°C)
Parameter Symbol Value Unit
Maximum Power Supply Voltage Maximum Power Dissipationnote1 Thermal Resistancenote1 Maximum Output Voltage Maximum Output Current Alarm Output Current Alarm Output Withstanding Voltage Operating Temperature Storage Temperature
VCCMAX PDMAX
JA
32 600 208 36 0.07 10 36
-25 ~ 85 -55 ~ 150
V mW
°C/W
VOMAX IOMAX IAL VAL TOPR TSTG
V A mA V
°C °C
Note1: PCB Condition: Thickness (1.6mm), Dimension (76.2mm * 114.3mm) Refer: EIA/J SED 51-3 & EIA/J SED 51-7 Should not exceed PD or ASO value
Power Dissipation Curve (Air condition = 0m/s)
Power dissipation (W)
0.6
Ambient temperature, Ta (°C) 25 150
Recommended Operating Conditions (Ta = 25°C)
Parameter Symbol Min. Typ. - Max. Unit
Function Compensation Operating Voltage
VCC
4.0
28.0
V
4
FAN8412M
Electrical Characteristics
(Ta=25°C, VCC=12V unless otherwise specified)
Parameter TOTAL S ymbol C onditions M in. Typ. M ax. Unit
Supply Current
HALL AMPLIFIER INPUT RANGE
ICC VHDC VHOF I LDC IL D D RCD V LDCL VLDCP VOH VO L VALL IAL
When output is off. VLD=1.5V VLD=1.5V RCD=ILDC/ILDD IO=10mA IO=10mA IO=10mA V A L=2.0V
1 15 2.2 0.4 3 2.54 0.54 10 8
3.2 3.8 0.88 5 2.94 0.74 10.5 0.2 -
5.0 Vcc-2 5.7 1.6 7 3.34 0.94 0.5 0.5 -
mA V mV
µA µA -
Pin2,4 Hall Input Range Pin2,4 Hall Input Offest
LOCK DETECTOR & AUTO RESTART
Pin6 Lock Detector Charging Current Pin6 Lock Detector Discharging Current Pin6 Lock Detector Charging/Discharging Ratio Pin6 Lock Detector Capacitor Clamp Voltage Pin6 Lock Detector Capacitor Comparator Voltage
OUTPUT STAGE
V V V V V mA
Pin7, 8 Output High Level Voltage Pin7, 8 Output Low Level Voltage
ALARM OUTPUT
Pin3 Alarm Output Low Level Voltaget Pin3 Alarm Output Current Capacity
5
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